This is a set up that is MOSTLY working, but I need to make an important change, and when I tried, it didn't work.
We have a few A records in our domain, but a lot of NS records. We do this because we want the request to be forwarded to our internal link balancer, which can reply with an IP address of a less burdened link at the time.
A records for domain.com
www --> 12.34.56.78
@ --> 12.34.56.78
vdns1 --> 12.34.56.98
vdns2 --> 98.78.54.32
NS records for domain.com
server1 --> vdns1.domain.com
server1 --> vdns2.domain.com
server2 --> vdns1.domain.com
server2 --> vdns2.domain.com
This way a request for server1.domain.com will query the 2 IP addresses for vdns1 and vdns2, which both go to our link balancer on different ISPs, and the link balancer will fulfill the DNS response.
As I mentioned before, this part is working. What I need to do is move the "@" A record to an NS record. Currently one of our ISPs is down, and I want our link balancer to respond with a different IP. When I delete the @ A record and have it go through NS, it doesn't work.
Any thoughts?
We have a few A records in our domain, but a lot of NS records. We do this because we want the request to be forwarded to our internal link balancer, which can reply with an IP address of a less burdened link at the time.
A records for domain.com
www --> 12.34.56.78
@ --> 12.34.56.78
vdns1 --> 12.34.56.98
vdns2 --> 98.78.54.32
NS records for domain.com
server1 --> vdns1.domain.com
server1 --> vdns2.domain.com
server2 --> vdns1.domain.com
server2 --> vdns2.domain.com
This way a request for server1.domain.com will query the 2 IP addresses for vdns1 and vdns2, which both go to our link balancer on different ISPs, and the link balancer will fulfill the DNS response.
As I mentioned before, this part is working. What I need to do is move the "@" A record to an NS record. Currently one of our ISPs is down, and I want our link balancer to respond with a different IP. When I delete the @ A record and have it go through NS, it doesn't work.
Any thoughts?